hequn8128 commented on a change in pull request #11342: [FLINK-16483][python]
Add Python building blocks to make sure the basic functionality of vectorized
Python UDF could work
URL: https://github.com/apache/flink/pull/11342#discussion_r389763484
##########
File path: flink-python/pyflink/fn_execution/coder_impl.py
##########
@@ -373,3 +376,45 @@ def internal_to_timestamp(self, milliseconds,
nanoseconds):
second, microsecond = (milliseconds // 1000,
milliseconds % 1000 * 1000 + nanoseconds //
1000)
return
datetime.datetime.utcfromtimestamp(second).replace(microsecond=microsecond)
+
+
+class ArrowCoderImpl(StreamCoderImpl):
+
+ def __init__(self, schema):
+ self._schema = schema
+ self._resettable_io = ResettableIO()
+
+ def encode_to_stream(self, cols, out_stream, nested):
+ if not hasattr(self, "_batch_writer"):
Review comment:
Why we must init the _batch_writer here instead of in `__init__`?
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